why renderman


#1

Hello. would like to know why so many studios use renderman. what reasons. ? rendering speed? or fotorealistichnochst. may be a stupid question but. wanted to ask it.


#2

To the best of my knowledge…

Renderman has several things going for it that are very friendly for large pipelines and feature film development. It’s primarily a rasterizer, which means it gets certain effects – displacement, fur, and motion blur, for example, are much cheaper than in a raytracing renderer. Renderman is also very friendly for the pipeline development process, because the spec has a full-featured shading language and scene language (RSL and RIB). Stereo productions also like PRMan because it has smaller overhead for rendering both eyes of a 3d image than other renderers.

Renderman is not necessarily faster than mental ray or Arnold, because some of the render time is offset earlier in the pipeline, in brickmap generation and caching, and can be much slower when creating the kinds of reflective and caustic effects that primarily raytracing renderers are good at. For most animation studios, this is not a major concern, because they generally are more concerned with a stylized look and feel than really accurate reflections.


#3

Also prman has been around for a long time, so many of the bigger studios started using it back in the day when they were smaller companies, and it’s grown with the company.

  • Neil

#4

We actually switched from mental ray to prman about a year ago. For commercial projects, vfx, and small-scale productions. I think mental ray or vray are excellent, but when you’re scaling up to a big pipeline with render farms and feature film demands… well, prman seems to be the easiest solution out there. I’d love to get my hands on Arnold, though.


#5

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